Pump



Nov. 26, 1940. s. JENclcK 2,222,869

PUMP

Filed May 27, 1957 v n 4 an nz@ 39V ATTORNEY l Patented Nov. 26, 1940UNITED STATES PATENT oFFlcE 6 Claims.

This invention relates to the art of devices for pumping liquid, and thepresent embodiment of my invention, as herein illustrated, is intendedfory use in pumping the liquid gasoline to the carburetor of an internalcombustion engine.

The object of this invention is to devise such a pump that will supplythe liquid only at the rate required.

More specically, the object is to provide such a pump with means forautomatically varying the effective stroke of the same in accordancewith the rate of consumption, as for instance, by the carburetor of aninternal combustion engme. A still more specic object is to devise sucha pump in which a permanent magnet and armature are employed as a meansfor operating a flexible diaphragm for pumping fthe liquid at a variablerate according to the rate required. so Another object is to provide animproved form of flexible liquid-proof diaphragm for use in connectionwith the pumping of liquid.

Other objects will appear from the following description and claims whenconsidered together with the accompanying drawing.

Fig. l is a top plan view of my improved pump;

Fig. 2 isa vertical sectional View corresponing with line 2 2 of Fig. i;and

Fig. 3 is a view corresponding to line of Fig. 1, the upper part beingin elevation and the lower partbeing in section.

It is to be understood that the present form ci disclosure is merely forpurposes of illustration and that -there may be devised other forms ofconstruction without departing from the spirit of the Present inventionas herein set forth and claimed.

As above indicated, my present improved form of` pump may be employed inconnection with an' 0 internal combustion engine; in which case, thepump is inserted in the gasoline supply line so as to pump the gasolineto the carburetor, as will be readily understood. 'Since this generalarrangement is quite familiar to those who are skilled in this art, itis deemed unnecessary to illustrate the same.

In the case of 'an` automobile internal combustion engine, the gasolinefeed pipe is connected to the inlet opening l of the present form ofpump, and the outlet opening 2 is connected to the gasoline feed pipewhich leads to the carburetor. The inlet I and outlet 2 are provided inthe upper part 3 of the casing, the lower part of which is indicated byreference numeral the pont lt through the screw plug ll.

(Cl. 10S-150) 4. The upper and lower parts of the casing are boltedtogether, as indicated at the points 5.

The passage 6 from the inlet I opens upwardly into a chamber 'l withinwhich the gasoline flow can be viewed through the glass closure 8 as itis being supplied through the pump. The closure 3 is secured in placeb-y means of the bail clamp 9 which can be freedby removing the screw l,whereupon the bail can be swung upwardly about its pivot point H. Theglass lclo- 10 sure 8 rests within a seat provided in the casing memberand its edge engages and maintains in place the ring washers l2 of corkor the like, between which the wire mesh screen i3 is held in position.Thus the gasoline passes throughl l5 the screen i3 as it is forcedthrough the pump.

The inlet disk valve ifi has the coil spring l5 which holds it normallyin closed position over This valve, when open, permits communication 20through the port iii and its companion port ill which opens into thechamber 2t.

The outlet valve disk 2li is normally held in closed position over theoutlet port 2l by the spring 22, this port 2l having communication 25with its companion port 23 when the valve 2li is open.

The disk valves il and 2li may both be of polygonal form so as tofacilitate the passage of the liquid about the edge thereof when opened,30 the port openings being of circular form.

it will be observed from the drawing that the upper and lower parts ofthe casing il and are so formed as to enclose the operating parts to befurther explained, and alos to aord a 3y chamber Within the chamber 2L?there is provided the diaphragm which is flexible and which is clampedabout its edge portion between the upper and lower parte d and d of thecasing. The composition and process oi' making the membrane of thediaphragm will be explained below.

The cupped metal disks 26 and 2l are secured to opposite sides of thediaphragm 25-by means of the rivet pin 2Q and the spacer block 29 whichis arranged between the disk 2l and the armature 30 for fthe magnet 3l.

The magnet 3l is a permanent magnet of U- shape and with portionsextending inwardly from 50 the upper ends o-f the arms or sides thereof,.as clearly seen in Fig. 2 of the drawing. There is a space left betweenthese inwardly extending portions so as to accommodate the spacer block29 for free relative movement with respect there- 55 to, as will beexplained. The armature 30 is wider than the space just referred to andis adapted for operative engagement with the under surfaces of theinwardly extending arm portions of the magnet 3l.

The magnet 3| is adapted for up and down movement within the casing,this movement being effected by means of the lever 32 with itscylindrical bearing portion 33 mounted for rocking movement in the wallof the casing. This lever is operated by means of the cam 34 on the camshaft which is connected with the engine of the automobile. As will beseen, the effeot of the cam 34 is to raise the inner end of the lever 32which will be returned to lower position by the coil spring 35 suitablymounted within the casing.

'I'he inner end of the lever 32 has a forked portion which extendsbeneath the magnet 3l and about the rivet pin 3S which in turn connectsthe saddle member 31 to the under-side of the magnet. I'his arrangementpermits raising of the magnet by the action oi the cam 34 and loweringof the same by the action of the spring 35.

'I'his pump, as a unit, is adapted to be mounted upon the automobileengine block by means of the attaching plate 38, and the lever 32 willextend to the inside of the engine for operation in the mannerexplained.

'I'he lower part 4 of the casing is formed with the heat-radiating fins39 in the region where the casing is mounted upon the engine block, thisprovision/ being for the purpose of dissipating the heat from the engineso as not to affect the magnet and also to preclude the formation ofvapor lock in the supply line of the gasoline. There is provided also anopening 40 in the wall of the lower part of the casing so that air willbe drawn into and discharged from the magnet chamber, this being alsofor cooling purposes.

The membrane of the diaphragm 25 consists of duck cloth impregnated witha combination of tung oil and soya bean oil, as will be now more fullyexplained. This oil combination is made up of about 47% per cent of tungoil, about 471/2 per cent of soya bean oil and about 5' per cent ofvegetable pigment, as for instance Vermilion; and these ingredients aremixed together so as to form a paste. The duck is impregnated with thispaste and is then baked in any suitable manner, as for instance bypassing the same between heated rollers under pressure so as to causethe paste to become fixed in the duck.

Thus there is obtained a liquid-proof membrane that will be found topossess a marked flexibility even when made comparatively thick. Thatis, the increase in the thickness of the membrane does not defeat itsflexibility to the same proportion as has been found to be true in othersuch membranes.

Also, my improved fo'rm of membrane will retain its flexibilitythroughout a wide range of temperature-from approximately 30 degreesbelow zero to approximately 335 degrees above zero, Fahrenheit.

Furthermore, in my new membrane there is no appreciable contraction orexpansion under varying conditions, and thus it remains constant withrespect to tautness and its action is likewise always constant anddependable.

The operation of my pump will now be explained. The parts are soconstructed and arranged that downward movement ofthe diaphragm willopen inlet valve. I4 and maintain outlet valve 20 closed so as to drawgasoline into the chamber above the diaphragm; and when the diaphragm ismoved upwardly, the inlet valve will be closed and held closed and thegasoline will be forced out through the outlet valve 2U.

The magnet and other parts, as indicated in the present drawing, are inlowered position, and it is assumed that gasoline has been drawn intothe chamber above the diaphragm. Then upon operation of the lever 32 bythe cam shaft, the magnet will be raised and it will carry the armaturewith it by virtue of the magnetic field. This upward movement of thearmature 30 causes actuation of the diaphragm upwardly so as to forcethe gasoline out through the valve 2U to the carburetor.

The length of stroke of the magnet is constant but the length of strokeof the armature and diaphragm is a variable dependent upon the degree ofresistance oiered by the gasoline, which in turn is determined by therate at which the gasoline is used by the carburetor at any given time.In case of the comparatively low rate of gasoline consumption by thecarburetor, that is less than the capacity of the pump for a given rateof operation of the cam shaft, then there will be more or less backingup of the gasoline in the supply line from the pump to the carburetor.

In my device, the parts are so constructed and arranged that suchpressure resistance may overcome the force of the magnetic field and themagnet will continue the latter part of its upward stroke without thearmature. The point at which this separation of the armature from themagnet takes place, will be determined by the amount of pressure oiieredto the further up ward movement of the diaphragm; in other words, it isdetermined by the ratio between the rate oi supply and the rate ofconsumption of the gasoline at any given time.

As the magnet is lowered by the action of the spring 35, the diaphragmwill be lowered thereby by virtue of the engagement of the inwardlyextending magnet arms with the armature, and the parts will again assumethe position indicated in me present drawing. The length of the returnstroke of the diaphragm, as just described, will also determine thequantity of gasoline that is drawn into the chamber above the diaphragm.Thus, the return stroke as well as the up stroke will be a variable.

Thus, with my device the gasoline will be pumped at the rate requiredaccording to the demand upon the carburetor at any given time. Thismeans that there will be a most efficient and dependable pumping of thegasoline since it will be supplied to the carburetor only as required;and this means also as increased economy.

Another advantage relates to the character of -the flexible materialprovided for use in connecthe gasoline in through the valve I4. Also,the

same thin form of membrane will likely be collapsed in the oppositedirection by the resistance of the gasoline when it is being expelledfrom the pump to the carburetor. As a result, the effectiveness anddependability of such a thin form of membrane are reduced to a`substantial extent and thus the rate of supply of the gasoline by thepump can not be relied upon with any degree of assurance.

In my device; however, the membrane is of such a character that it canbe made thicker so as to preclude the danger of collapsing; while at thesame time, this comparatively thick membrane possesses sufcent exibilityto ensure proper functioning of the diaphragm in the manner herein setforth.

While, for the sake of a clear understanding of my present invention, Ihave herein described it as being used in connection with an automobileengine, it is to be understood that this pump may be employed inconnection with other liquids and as part of other devices.

What I claim is:

l. A liquid pump comprising a. casing adapted for connection in theliquid supply line, means operatable back .and forth Within the casingfor pumping the liquid therethrough, a permanent magnet operatable backand forth, an armature carried by said pumping means and adapted foractuation by said magnet, and means for operating said magnet.

2. A liquid pump comprising a casing adapted for connection inthe liquidsupply line, means operatable back and forth Within the casing forpumping the liquid therethrough, a permanent magnet operable back andforth, an armature carried by said pumping means and adapted foractuation by said magnet, and means for operating said magnet, therebeing a predetermined magnetic force between the magnet and armatureadaped to permit separation of the same upon encountering apredetermined liquid pressure resistance by the pumping means.

3. A liquid pump comprising a casing adapted for connection in theliquid supply line, a reciprocatable diaphragm within the casing forpumping the liquid therethrough, a reciprocatable permanent magnetWithin the casing, an armature carried by said diaphragm and adapted foractuation by said magnet, and means for operating said magnet, t erebeing a predetermined magnetic force between the magnet and armatureadapted to permit separation of the same upon encountering apredetermined liquid pressure resistance by the pumping inea ns.

Ll. A liqu pump lornprising a casing adapted for connection in theliquid supply line, inlet and outlet one-way valves in said casing forconu trolling the flow of liquid into and out of the same, areciprocatable diaphragm Within the casing for pumping the liquid intoand out of the same through the valves, a reciprocatable permanentmagnet within the casing, an armature carried by said diaphragm andadapted for actuation by said magnet, and means for operating saidmagnet, there being a predetermined magnetic force between the magnetand armature adapted to permit separation of the same upon encounteringa predetermined liquid pressure resistance by the pumping means.

5. A liquid pump comprising a casing adapted for connection in theliquid supply line, a reciprocatable diaphragm Within the casing forpumping the liquid therethrough, a reciproeatable permanent magnetWithin the casing, an armature carried by said diaphragm and adapted foractuation by said magnet, means for operating said magnet, and saidcasing having an opening in the Wall thereof so as to permit theentrance and exit of air therethrough into and from the interior of thecasing for cooling the same.

6. A liquid pump comprising a casing adapted for connection in theliquid supply line, a reciprocatable diaphragm Within the casing forpumping the liquid therethrough, a reciprooiatable permanent magnetWithin the casing, an armature' carried by said diaphragm and adaptedfor actuation by said magnet, means mounted in the wall of the casingfor operating said magnet, and heat-radiating means provided upon thecasing in the region of said operating means for the purpose ofpreventing over-heating of the same.

STEPHEN J ENCICK.

